Exercise 8

Question 1

sensory receptors

Answer 1

detection of stimuli accomplished by these; they can be specialized cells that can pass the info on to the afferent neuron or they may be neurons w specialized dendrites able to detect stimulus directly

Question 2

exteroceptors

Answer 2

include cutaneous receptors, taste, olfaction, vision, and hearing

Question 3

interoceptors

Answer 3

include visceroceptors (internal pain receptors, baroreceptors, osmoreceptors) and proprioceptors

Question 4

law of specific nerve energies

Answer 4

the sensory pathway carries the info from a sensory receptor to a specific area in the brain where it is interpreted; the interpretation of the stimulus is determined by the final destination in the brain

each sensory receptor organ and its nerve fiber receive and transmit just one modality of sensation

each type of sensation depends on the part of the brain in which their impulses terminate

Question 5

posterior column

Answer 5

carry info regarding discriminatory touch, vibration, conscious muscle sense, and joint movement

first-order extends from the receptor in the CNS to the medulla where it synapses w the second order neuron and where the second order neuron decussates

Question 6

lateral spinothalamic tracts

Answer 6

carry. info regarding pain and temperature

first order extends from the receptor to. the spinal cord, where it synapses w. the second order neuron and where the second order neuron decussates

Question 7

anterior spinothalamic tracts

Answer 7

carry info regarding light touch and light pressure

first order neuron extends from the receptor to the spinal cord where it synapses w the second order neuron and where the second order neuron decussates

Question 8

tonic receptors

Answer 8

slow adaption characterized by initial rapid firing followed by a reduced but constant or tonic rate of firing even though the same intensity of stimulation is present

Question 9

phasic receptors

Answer 9

have rapid adaptation characterized by initial rapid firing followed by no firing even though the same intensity of stimulation is present; will sometimes again send action potentials when the stimulus is removed

Question 10

secondary receptor field

Answer 10

when multiple first-order sensory neurons convert on one second order sensory neuron, the total area covered by the receptors and the convening first order neurons comprises this

Question 11

two point discrimination test

Answer 11

allows you to determine the size of the receptor fields

areas of the. skin w. a larger two point discrimination distance will have larger primary receptor fields and more sensory neuron convergence

Question 12

receptor

Answer 12

transducer